Dear folks,

I think I’m having a strange observation and I cannot figure it out. I use this test image to play around (strangely when I try to properly upload the image the website cannot determine the size of the image - but this should not be a problem with respect to testing what I see):

I perform the following operations to extract polar coordinates from the FFT power spectrum:

```
width=getWidth;
height=getHeight;
run("FFT");
run("Set Measurements...", "integrated display redirect=None decimal=5");
//for each pixel extract radius and angle
for (i=0; i<width ; i++)
{
for (j=0; j<height ; j++)
{
makePoint(i,j);
run("Measure");
}
}
```

The above actions results in a table with 7 columns:

**Label, X, Y, IntDen, RawInDent, R, Theta**

Via hovering with the mouse over the FFT image you can read the polar coordinates in the ImageJ window, and use this to check data in the table. The results in the table appear to be slightly funny:

→ the results for **R** and **Theta** in the results table are shifted 1 row up from the rest of the data:

The easiest locations in the image to check is near the center of the FFT power spectrum, and near the corners / edges, e.g. these coordinates:

[0, 0]

[0, 127]

[127, 0]

[127, 127]

near [64, 64].

In my macro I adjust the results so that I can work further with the data, but I am very puzzled by this.

Am I having a brain fart or is something indeed going wrong?